<template>
    <div class="body1">
        <div class="no-print el-button-print">
            <el-button @click="exportPDF">导出为pdf</el-button>
        </div>

        <div class="body2" id="pdfDom" :class="{ 'pdf-export': isPdfExport }">
            <div class="title">
                <div class="biaotididian">{{ agencyName }}</div>
                <div class="biaoti">回避申请</div>
            </div>
            <table class="tableStyle1">
                <div style="display: flex; align-items: center; justify-content: center;width: 100%; height: 840px; border: 1px solid #000;"
                    @click="chooseImage">
                    <img v-if="!isLoading && form.imageSrc" :src="form.imageSrc" alt="回避申请"
                        style="max-height: 99%; max-width: 99%;">
                    <input type="file" accept="image/*" style="display: none" ref="imageInput"
                        @change="handleFileChange">
                    <div v-if="!form.imageSrc || isLoading" class="placeholder-image">请上传回避申请图片</div>
                </div>
            </table>
        </div>
    </div>

</template>

<script>
import { agencyName, sealName } from "../../utils/publicName.js"
import axios from 'axios';

export default {
    data() {
        return {
            agencyName: agencyName,
            sealName: sealName,
            isLoading: false,
            resultImgurl: '',
            form: {
                imageSrc: "",
            },
            status: '', //当前文书的状态
            isPdfExport: false, //控制打印样式
        }
    },

    created() {
        window.parent.getTemplateData((data, status) => {
            this.form = data;
            this.status = status;
        })
        window.postForm = () => {
            this.postForm();
        }
    },

    mounted() {
        window.parent.changeTemplateDow();
    },

    methods: {
        // 导出为pdf
        exportPDF() {
            this.savePDF()
                .then((blob) => {

                    const blobUrl = URL.createObjectURL(blob);

                    // 先预览
                    const previewWindow = window.open(blobUrl, '_blank');

                    // 自动下载
                    const fileName = `回避申请.pdf`;
                    const downloadLink = document.createElement('a');
                    downloadLink.href = blobUrl;
                    downloadLink.download = fileName;
                    document.body.appendChild(downloadLink);
                    downloadLink.click();
                    document.body.removeChild(downloadLink);

                    // 监听预览窗口关闭后释放内存
                    if (previewWindow) {
                        const timer = setInterval(() => {
                            if (previewWindow.closed) {
                                clearInterval(timer);
                                URL.revokeObjectURL(blobUrl);
                            }
                        }, 1000);
                    } else {
                        setTimeout(() => URL.revokeObjectURL(blobUrl), 10000); // 兜底释放
                    }
                })
                .catch(error => {
                    console.error('导出PDF出错:', error);
                    alert('导出失败，请重试或联系管理员');
                });
        },
        savePDF() {
            this.isPdfExport = true; // 激活PDF样式
            return new Promise((resolve, reject) => {
                this.$nextTick(() => {
                    import('html2pdf.js').then((module) => {
                        const html2pdf = module.default;

                        //获取所有需要替换的 el-input
                        const elInputs = document.querySelectorAll('.el-input__inner, .el-textarea__inner');

                        //存储原始元素和它们的父节点，方便后续恢复
                        const originalElements = [];

                        elInputs.forEach((input) => {
                            const div = document.createElement('div');
                            div.style.whiteSpace = 'pre-wrap'; // 保留换行
                            div.style.fontFamily = '仿宋';
                            div.style.fontSize = '5mm';
                            div.textContent = input.value; // 保留原内容（自动处理 \n 换行）
                            div.style.lineHeight = '1.3';

                            // 替换 el-input，并存储原始元素
                            originalElements.push({
                                parent: input.parentNode,
                                original: input,
                                replacement: div,
                            });
                            input.parentNode.replaceChild(div, input);
                        });

                        // 配置选项
                        const opt = {
                            margin: 0,
                            image: {
                                type: 'jpeg',
                                quality: 0.98
                            },
                            html2canvas: {
                                scale: 2,
                                logging: false,
                                useCORS: true
                            },
                            jsPDF: {
                                unit: 'mm',
                                format: 'a4',
                                orientation: 'portrait'
                            }
                        };

                        const element = document.getElementById('pdfDom');

                        // 生成PDF Blob对象
                        html2pdf()
                            .set(opt)
                            .from(element)
                            .toPdf()
                            .get('pdf')
                            .then((pdf) => {
                                const blob = pdf.output('blob');

                                resolve(blob); // 返回Blob对象
                            })
                            .catch((error) => {
                                reject(error);
                            })
                            .finally(() => {
                                this.isPdfExport = false; // 恢复原始样式
                            });
                    }).catch((error) => {
                        reject(error);
                        this.isPdfExport = false;
                    });
                });
            });
        },
        //父页面提交按钮将调用此方法，此方法将文书数据回传到父页面的请求方法中
        postForm() {
            this.savePDF()
                .then((blob) => {


                    // 创建FormData并添加文件
                    const formData = new FormData();
                    formData.append('file', blob, '回避申请.pdf');

                    window.parent.postTemplateDate(this.form, formData);
                })
                .catch(error => {
                    console.error('整个保存PDF出错:', error);
                });
        },
        //选择日期时间
        receiveFromChild(data, type) {
            const TypeMap = {
                'YYYYMMDD1': 'date1',
                'YYYYMMDD2': 'date2',
                'YYYYMMDD3': 'date3',
            };
            if (TypeMap[type]) {
                this.form[TypeMap[type]] = data;
            }
        },
        //选择执法人员
        handleInvestigatorChange({ identificationNumber, idField }) {
            if (idField && identificationNumber) {
                this.form[idField] = identificationNumber;
            }
        },
        // 选择单位
        selectUnitUpdateData(data) {
            data.forEach(item => {
                this.form[item.name] = item.value;
            })
        },
        chooseImage() {
            this.$refs.imageInput.click();
        },
        async handleFileChange(event) {

            // debugger;
            try {
                const file = event.target.files[0];
                const reader = new FileReader();
                reader.onload = () => {
                    this.form.imageSrc = reader.result;
                };

                if (file) {

                    this.isLoading = true;
                    reader.readAsDataURL(file);
                    setTimeout(() => {
                        this.isLoading = false;
                    }, 2000);

                    const formData = new FormData();
                    // 添加 file 属性，并指定文件名
                    formData.append('file', file);

                    // 设置 Content-Type 头部为 multipart/form-data
                    const config = {
                        headers: {
                            'Content-Type': 'multipart/form-data'
                        }
                    };

                    const response = await axios.post('/api/related-file/uploadSign', formData, config);
                    const { code, data, message } = response.data;
                    console.log(response.data);

                    if (code === '200') {
                        if (data && data.url) {
                            this.resultImgurl = data.url;
                        } else {
                            throw new Error('图片上传失败，请重试！');
                        }
                    } else {
                        throw new Error(message || '图片上传失败，请重试！');
                    }
                    const url = `api/file/download/${this.resultImgurl}`;
                    this.form.imageSrc = url
                }
            } catch (err) {
                this.$emit('updateSignImg', '', this.signType);
            }
        },
    }
}
</script>

<style scoped>
.official-seal {
    /* 公章隐藏*/
    display: none;
    width: 4.2cm;
    height: 4.2cm;
    z-index: 20;

    /* 定位 */
    position: absolute;
    bottom: -20px;
    right: -10px;
}


:deep(.el-button-print .el-button) {
    display: inline-flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    width: auto;
    min-width: 100px;
    height: auto;
    padding: 8px 15px;
    background: #fff !important;
    color: #000 !important;
    border: none;
}

:deep(.el-textarea__inner) {
    box-shadow: 0 0 0 0;
    color: black;
    padding: 0;
    font-family: "仿宋", serif;
    font-size: 19px;
    overflow-y: hidden;
    line-height: 30px;

    /* 下划线 */
    border-radius: 0px;
    background-image: linear-gradient(to top, #000000 0.5px, transparent 1px);
    background-size: 100% 30px;
    background-position: 0 -3px;
}

:deep(.el-textarea-hidden .el-textarea__inner) {
    box-shadow: 0 0 0 0;
    color: black;
    padding: 0;
    font-family: "仿宋", serif;
    font-size: 19px;
    overflow-y: hidden !important;
    resize: none !important;
    height: auto !important;
}

:deep(.el-select .el-input__inner) {
    text-align: center;
    height: 5mm;
}

.input-container {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
}

.inputStyleNoLine {
    border: none;
    outline: none;
    padding: 0px;
}

.typeSpan {
    cursor: pointer;
    font-size: 5mm;
}
</style>
